Familial polyposis or familial adenomatous polyposis (FAP) is a premalignant disease. This means that a person with FAP, if left untreated, will invariably develop cancer. Individuals with this disorder grow hundreds of polyps.
The abnormal portion of the gene that causes FAP in most patients can be detected. A blood test can then be performed which identifies family members who have the same mutation. They will eventually...
It has been estimated that a patient with known FAP has a relative risk of dying over three times greater than that of the average population, at a given age.